What Is a ‘Circuit Breaker’ and How Can It Mitigate Flash Crash Risks?

A circuit breaker is a temporary trading halt or restriction imposed by an exchange when market volatility exceeds a predefined threshold. Its purpose is to pause trading, allow the market to cool down, and prevent panic selling or cascading liquidations from spiraling out of control.

By halting or slowing down trading, it gives the exchange time to manage risk and allows traders to post additional margin, thereby mitigating flash crash risks.

How Do “Circuit Breakers” Mitigate Slippage Risk in Traditional Markets?
How Does a ‘Circuit Breaker’ on the Index Price Affect Trading?
How Do Exchanges Prevent Cascading Liquidations during High Volatility?
How Do Circuit Breakers on an Exchange Prevent a Cascading Margin Call Failure?
What Is the Role of a ‘Circuit Breaker’ in a Decentralized Exchange?
What Is the Role of a ‘Circuit Breaker’ in Preventing Rapid Liquidations?
How Do Circuit Breakers on Derivatives Exchanges Attempt to Halt a Liquidation Cascade?
How Does a ‘Circuit Breaker’ Mechanism Protect a Derivatives Protocol from Black Swan Events?

Glossar